MODEL FL639 STRAIN GAGE AMPLIFIER (OBSOLETE)
Description
The Model FL639 strain gage amplifier is a compact bridge amplifier, complete with voltage and current excitation, adjustable gain, zero, and bridge balance, lowpass filtering and shunt calibration. The unit is designed to be mechanically and electrically compatible with Encore’s other Flex-line DIN-rail mounted instrumentation.
Specifications
| Bridge configuration: | Quarter, half, and full bridges, with internal bridge completion header |
| Bridge excitation: | Front panel adjustable, 4 to 10VDC; constant current of 10 to 20 mADC also available |
| Bridge balance: | Front panel trimpot allows adjustment of bridge imbalance |
| DC shunt calibration: | Header-mounted calibration resistor wired to screw terminal for external connection to +S or -S terminal; internally jumpered to either +P or -P |
| Gain range: | 2-2000, with coarse and fine trimpot adjustments; factory set for range of 100-500 |
| Frequency response: | Two-pole lowpass, DC to 1kHz; header-adjustable from 10Hz to 20kHz |
| Voltage output: | ±10V max, 10mA peak load |
| Current output: | 4-20mA output follows signal output of 0-10V, or may be connected as a constant current excitation source adjustable from 10-20mA |
| Output noise: | 2 microvolts RMS RTI max, DC to 20kHz at G=1000, no filter header |
| Connections: | Twelve wireclamp screw terminals accept wire sizes from 24-14 gauge |
| Test points: | Three tipjacks allow voltmeter connection to Balance terminal and Output terminal |
| Mechanical: | 2.9″ x 3.1″ x 1.9″ plastic enclosure; mounts on standard 35mm DIN-rail |
| Power: | Regulated ±15V at 35mA, plus excitation load, from external supply |